Once you have the results you compare your gauge reading to manufacturer specifications and interpret your results. Press the pressure release valve on the side of the gauge which will return the gauge to zero pressure for the next test.
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Diagnostic Engine Tools Cylinder Head Spark Plug Compression
How to compression test engine. It is important to perform a compression test every time a tune up is done as part of preventative maintenance. The needle on the compression gauge will stay at the highest indicated compression reading. Consider doing a compression test. If your engine is running rough or is lacking power. A compression test can also inform of an individual cylinder problem which can be repaired. Look down on the engine to figure out which.
Performing the test 1. Double check that you disconnected the appropriate stuff so the engine doesnt actually start. The next step depends on the type of distributor you have. A compression test is a good way to measure the condition of the rings cylinders and valves. Cylinder compression can inform you on how much wear an engine has on. Have someone sit in the drivers seat with the engine off the gearshift in park or neutral and the parking brake on.
Youre all set up now and ready to actually do the compression test. You can compression test the cylinders with the help of a compression gauge. Crank the engine at least 4 times to. On vehicles with distributors. All you have to do is connect the gauge in place of a spark plug and test each cylinder pressure in turn. Connect the compression gauge to the opposite end of the hose.
On vehicles with. Pull the big wire that leads. Heres how to use a compression gauge. If youre testing a diesel engine make sure youre. Now turn the key and crank the engine over for about 10 seconds. Put the compression test adapter into the engines first cylinder.
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